Magnetized orbits around a Kerr black hole

Felice, F. de; Sorge, Francesco; Zilio, Silvio

doi:10.1088/0264-9381/21/4/016

Cited by 63 publications

(38 citation statements)

References 8 publications

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“…In the limiting case when γ = 1 we will get the expression (16) for the magnetized particle motion around Schwarzschild BH in the magnetic field (see, e.g., [73]). Consider the conditionṡ…”

Section: Magnetized Particles Motionmentioning

confidence: 99%

“…The formalism of studying the motion of particles with a nonzero magnetic dipole moment around weakly magnetized Schwarzschild BH was first proposed in Reference [72]. This study has been extended to the rotating Kerr BH case in [73]. The magnetized particle dynamics around BH in alternate theories of gravity have been studied by several authors [50,[74][75][76][77][78][79][80][81].…”

Section: Introductionmentioning

confidence: 99%

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Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

et al. 2020

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In the present work we explored the dynamics of magnetized particles around the compact object in γ-spacetime in the presence of an external asymptotically-uniform magnetic field. The analysis of the circular orbits of magnetized particles around the compact object in the spacetime of a γ-object immersed in the external magnetic field has shown that the area of stable circular orbits of magnetized particles increases with the increase of γ-parameter. We have also investigated the acceleration of the magnetized particles near the γ-object and shown that the center-of-mass energy of colliding magnetized particles increases with the increase of γ-parameter. Finally, we have applied the obtained results to the astrophysical scenario and shown that the values of γ-parameter in the range of γ∈(0.5,1) can mimic the spin of Kerr black hole up to a≃0.85, while the magnetic interaction can mimic the γ-parameter at γ∈(0.8,1) and spin of a Kerr black hole up to a≃0.3.

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Section: Magnetized Particles Motionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

et al. 2020

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“…(4.5) we can also discuss the motion of a magnetic dipole [21,22,6,7] with magnetic moment µ α = −(µ/r)δ α θ . The force driving the motion in this case is given by…”

Section: Particles With a Magnetic Dipole Momentmentioning

confidence: 99%

Accelerated orbits in black hole fields: the static case

Bini

Felice

Geralico

2011

Class. Quantum Grav.

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Abstract. We study non-geodesic orbits of test particles endowed with a structure, assuming the Schwarzschild spacetime as background. We develop a formalism which allows one to recognize the geometrical characterization of those orbits in terms of their Frenet-Serret parameters and apply it to explicit cases as those of spatially circular orbits which witness the equilibrium under conflicting types of interactions. In our general analysis we solve the equations of motion offering a detailed picture of the dynamics having in mind a check with a possible astronomical set up. We focus on certain ambiguities which plague the interpretation of the measurements preventing one from identifying the particular structure carried by the particle.PACS number: 04.20.Cv

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“…It was also shown that magnetized particles can move along stable non-geodesic, spatially circular equatorial orbits with the radius smaller than innermost stable circular orbits (ISCO) (in the case of non-rotating black holes) and close to photon orbit. The magnetized particle motion around rotating black holes has been studied in [43].…”

Section: Introductionmentioning

confidence: 99%

Magnetized Particle Motion around Black Holes in Conformal Gravity: Can Magnetic Interaction Mimic Spin of Black Holes?

et al. 2020

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Magnetized particle motion around black holes in conformal gravity immersed in asymptotically uniform magnetic field has been studied. We have also analyzed the behavior of magnetic fields near the horizon of the black hole in conformal gravity and shown that with the increase of conformal parameters L and N the value of angular component of magnetic field at the stellar surface decreases. The maximum value of the effective potential corresponding to circular motion of the magnetized particle increases with the increase of conformal parameters. It is shown that in all cases of neutral, charged and magnetized particle collisions in the black hole environment the center-of-mass energy decreases with the increase of conformal parameters L and N. In the case of the magnetized and negatively charged particle collisions, the innermost collision point with the maximum center-of-mass energy comes closer to the central object due to the effects of the parameters of the conformal gravity. We have applied the results to the real astrophysical scenario when a pulsar treated as a magnetized particle is orbiting the super massive black hole (SMBH) Sgr A* in the center of our galaxy in order to obtain the estimation of magnetized compact object’s orbital parameter. The possible detection of pulsar in Sgr A* close environment can provide constraints on black hole parameters. Here we have shown that there is degeneracy between spin of SMBH and ambient magnetic field and consequently the interaction of magnetic field ∼ 10 2 Gauss with magnetic moment of magnetized neutron star can in principle mimic spin of Kerr black holes up to 0.6 .

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Magnetized orbits around a Kerr black hole

Cited by 63 publications

References 8 publications

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

Accelerated orbits in black hole fields: the static case

Magnetized Particle Motion around Black Holes in Conformal Gravity: Can Magnetic Interaction Mimic Spin of Black Holes?

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